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This Minireview provides an overview of the chemistry of pyrazole and N‐heterocyclic carbene (NHC) complexes bearing an NH group at the β‐position to the metal. The synthesis and structures as well as the Brønsted acidic nature of the β‐NH group are described in detail. These complexes are attractive candidates for novel metal–ligand cooperative bifunctional catalysts, which would benefit highly effective...
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